Unhandled Access Violation in ntdll.dll When Building Assets For Scene.

Everytime I try to build my project; Unity Editor crashes when the compiler reaches "Building assets for scene".

Note, it crashes, not freeze.

Scene 0 builds fine because there is barely anything in it, but any other scene fails with.

Unhandled exception at 0x00007FFB19A9B179 (ntdll.dll) in Unity.exe: 0xC0000005: Access violation writing location 0x0000000000000118.

I'm using V5.1.2f1 and I've tried reinstalling it.

I did not have this problem a few months ago with 4.x, but the project has grown a lot since then and I have not built an .exe since then.

Game runs fine in editor.

Any advice on how to debug this is greatly appreciated.

Thanks.

 

I answered my own question at: http://answers.unity3d.com/answers/1012302/view.html

My issue was very specific, but perhaps this can help someone debug a similar issue.

But I have not found the root cause, recommendations of where to look next are appreciated.